This is not food but the lack of insulin causes diabetes

We need all human energy to survive. We are billions of smaller units called by the cells. Our cells need energy to work. We eat to get energy from food. What we eat is carbohydrates, proteins and fats as energy supply field. A healthy diet contains about 60% carbohydrates, 20% protein and 20% fat.
After the consumption of carbohydrate component of food into glucose in the intestine is broken. This leads to glucose in the blood and body cells. This glucose is required to enter into the cell to provide energy.

However, glucose can not enter the cell does not help other than insulin. Insulin is a hormone continuously released from the pancreas and insulin to glucose in cells.

The food is glucose and glucose is converted to bring the body's cells with the help of insulin are available. Insulin is not a drug, since most people. It is a hormone produced in the pancreas. It is a continuous release of insulin in the pancreas from birth to death.
When we eat, glucose enters the blood and produce at a rate of entry of glucose, insulin in the pancreas increases. This additional amount of insulin that moves glucose from food into body cells where it is used for energy supply.
When the pancreas does not produce enough insulin, or the work of insulin circulating in the blood produce less efficient, the food intake, glucose enters the blood, but can not move cells in the body and therefore the level begins increase in the blood at this stage as diabetes.

Thus, the diabetes, the body's cells are removed from one part of glucose and other circulating at high levels in the blood and becomes different chemicals that could damage the eyes, kidneys, nerves, heart, etc.

Aim to maintain diabetic treatment desired amount of insulin in the blood, so keep sugar levels within normal limits. Any treatment strategy that can keep insulin levels required amount, will help keep blood sugar within normal limits.